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→BMP Components and Test Methods
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[[File:Soil bulk density figure 8.7.PNG|thumb|325px|Maximum allowable bulk density values by soil texture class (Sustainable Sites Initiative, 2009). '''Click to enlarge'''.<ref>Sustainable Sites Initiative. 2009. The Sustainable Sites Initiative: Guidelines and Performance Benchmarks. American Society of Landscape Architects, Lady Bird Johnson Wildflower Center at The University of Texas at Austin, United States Botanic Garden and Sustainable Sites Initiative, Austin, TX. https://digital.library.unt.edu/ark:/67531/metadc31157/</ref>]]
[[File:Soil bulk density figure 8.7.PNG|thumb|485px|Maximum allowable bulk density values by soil texture class (Sustainable Sites Initiative, 2009). '''Click to enlarge'''.<ref>Sustainable Sites Initiative. 2009. The Sustainable Sites Initiative: Guidelines and Performance Benchmarks. American Society of Landscape Architects, Lady Bird Johnson Wildflower Center at The University of Texas at Austin, United States Botanic Garden and Sustainable Sites Initiative, Austin, TX. https://digital.library.unt.edu/ark:/67531/metadc31157/</ref>]]
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Key components of LID BMPs that should be the subject of sediment accumulation testing (i.e., depth measurements) are described in the table below along with recommended test methods. Depth measurements should be recorded on inspection field data forms provided on each associated [[Inspections and maintenance#Practice-specific Inspection and Maintenance|BMP's I&M page on the wiki]], used to determine if sediment removal maintenance is needed.
Key components of LID BMPs that should be the subject of sediment accumulation testing (i.e., depth measurements) are described in the table below along with recommended test methods. Depth measurements should be recorded on inspection field data forms provided on each associated [[Inspections and maintenance#Practice-specific Inspection and Maintenance|BMP's I&M page on the wiki]], used to determine if sediment removal maintenance is needed.
[[File:Secch idisk.PNG|thumb|320px|Picture of a typical Secchi disk to help measure sediment depth in underground holding structures. (Photo Source: Wildco, 2018)<ref>Wildco. 2018. Secchi Disk Kit, Fieldmaster®. Accesses May 5 2022: https://shop.sciencefirst.com/wildco/student-water-samplers/5979-fieldmaster-student-secchi-disk-non-calibrated-line-for-student-use-only-200mm.html</ref>]]
[[File:Secch idisk.PNG|thumb|465px|Picture of a typical Secchi disk to help measure sediment depth in underground holding structures. (Photo Source: Wildco, 2018)<ref>Wildco. 2018. Secchi Disk Kit, Fieldmaster®. Accesses May 5 2022: https://shop.sciencefirst.com/wildco/student-water-samplers/5979-fieldmaster-student-secchi-disk-non-calibrated-line-for-student-use-only-200mm.html</ref>]]
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|+'''Key components and test methods for sediment accumulation testing by BMP type'''
|+'''Key components and test methods for sediment accumulation testing by BMP type'''
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[[File:Two prong method catchbasin sediment acc..PNG|thumb|320px|Measuring sediment depth in a catchbasin utilizing the "two prong method" (Photo Source: King
[[File:Two prong method catchbasin sediment acc..PNG|thumb|435px|Measuring sediment depth in a catchbasin utilizing the "two prong method" (Photo Source: King
County, 2010)<ref>King County. 2010. Tips for Successful Drainage Facility Self-Inspection. Department of Natural Resources and Parks. File Name: 0906_DrainTIPS.indd lpre. Developed: June, 2010. https://www.seatacwa.gov/home/showpublisheddocument/31441/637662770980630000</ref>]]
County, 2010)<ref>King County. 2010. Tips for Successful Drainage Facility Self-Inspection. Department of Natural Resources and Parks. File Name: 0906_DrainTIPS.indd lpre. Developed: June, 2010. https://www.seatacwa.gov/home/showpublisheddocument/31441/637662770980630000</ref>]]
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|[[Permeable pavement: Plan review|Pavement surface]]
|[[Permeable pavement: Plan review|Pavement surface]]
|Use a single-ring infiltrometer to measure field saturated hydraulic conductivity (K<sub>S</sub>) in at least 3 locations for areas up to 2,500 m<sup>2</sup> and one additional location for each additional 1,000 m<sup>2</sup> of pavement surface area, or fraction thereof, evenly distributed. For permeable interlocking pavers, follow the procedure provided by ASTM C1781_C1781M – 15 (ASTM International, 2015<ref>ASTM International. 2015. ASTM C1781/C1781M-15 - Standard Test Method For Surface Infiltration Rate Of Permeable Unit Pavement Systems. Accessed May 5 2022: https://webstore.ansi.org/Standards/ASTM/astmc1781c1781m15</ref>). For pervious concrete or porous asphalt, follow the procedure provided by ASTM C1701_C1701M – 09 (ASTM International, 2009<ref>ASTM International. 2009. ASTM C1701/C1701M-09 - Standard Test Method for Infiltration Rate of In Place Pervious Concrete. Accessed May 5 2022: https://www.astm.org/c1701_c1701m-09.html</ref>). Compare mean and individual values to the design specification or trigger value (See Triggers for follow-up and corrective actions below) to determine if follow-up tasks are needed.)
|Use a single-ring infiltrometer to measure field saturated hydraulic conductivity (K<sub>S</sub>) in at least 3 locations for areas up to 250 m<sup>2</sup> and one additional location for each additional 100 m<sup>2</sup> of pavement surface area, or fraction thereof, evenly distributed. For permeable interlocking pavers, follow the procedure provided by ASTM C1781_C1781M – 15 (ASTM International, 2015<ref>ASTM International. 2015. ASTM C1781/C1781M-15 - Standard Test Method For Surface Infiltration Rate Of Permeable Unit Pavement Systems. Accessed May 5 2022: https://webstore.ansi.org/Standards/ASTM/astmc1781c1781m15</ref>). For pervious concrete or porous asphalt, follow the procedure provided by ASTM C1701_C1701M – 09 (ASTM International, 2009<ref>ASTM International. 2009. ASTM C1701/C1701M-09 - Standard Test Method for Infiltration Rate of In Place Pervious Concrete. Accessed May 5 2022: https://www.astm.org/c1701_c1701m-09.html</ref>). Compare mean and individual values to the design specification or trigger value (See Triggers for follow-up and corrective actions below) to determine if follow-up tasks are needed.)
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